CVE-2026-21827

LOWPre-NVD 3.13.1—
EchelonGraph scoreHIGH confidence

Score 3.1 from GitHub Security Advisory (severity: LOW) published 2026-08-31. a secondary CVSS source baseline 3.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
3.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 3.1Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

HCL Connections is vulnerable to an information disclosure vulnerability which could allow a user to obtain sensitive information they are not entitled to, caused by improper handling of request data they are not entitled to, caused by improper handling of request data.

CVSS v3
3.1
EG Score
3.1(high)
EG Risk
14(Track)
EG Risk 14/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity31% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
5%
KEV
Not listed

Published

August 31, 2026

Last Modified

September 3, 2026

References (1)

Vendor Advisories for CVE-2026-21827(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 33× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-18 19:27 UTCEPSS rescore
  2. 2026-09-17 13:04 UTCEG score recompute
  3. 2026-09-17 13:03 UTCGHSA enrichment
  4. 2026-09-16 14:07 UTCEPSS rescore
  5. 2026-09-16 05:15 UTCEPSS rescore
  6. 2026-09-14 18:41 UTCEG score recompute
  7. 2026-09-14 18:41 UTCGHSA enrichment
  8. 2026-09-13 16:47 UTCEPSS rescore
  9. 2026-09-12 15:01 UTCEPSS rescore
  10. 2026-09-11 23:20 UTCEG score recompute
  11. 2026-09-11 23:20 UTCGHSA enrichment
  12. 2026-09-11 14:52 UTCEPSS rescore
  13. 2026-09-10 09:34 UTCEPSS rescore
  14. 2026-09-09 05:19 UTCEG score recompute
  15. 2026-09-09 05:18 UTCGHSA enrichment
  16. 2026-09-08 22:00 UTCEPSS rescore
  17. 2026-09-07 16:01 UTCEPSS rescore
  18. 2026-09-06 13:47 UTCEPSS rescore
  19. 2026-09-06 13:47 UTCEPSS rescore
  20. 2026-09-06 11:16 UTCEG score recompute
  21. 2026-09-06 11:16 UTCGHSA enrichment
  22. 2026-09-04 05:06 UTCEPSS rescore
  23. 2026-09-03 17:15 UTCEG score recompute
  24. 2026-09-03 17:15 UTCGHSA enrichment
  25. 2026-09-02 14:11 UTCEPSS rescore
Show 8 more
  1. 2026-09-01 15:43 UTCEG score recompute
  2. 2026-09-01 15:43 UTCGHSA enrichment
  3. 2026-09-01 15:03 UTCEG score recompute
  4. 2026-09-01 15:03 UTCGHSA enrichment
  5. 2026-09-01 13:53 UTCEPSS rescore
  6. 2026-08-31 16:23 UTCEG score recompute
  7. 2026-08-31 15:58 UTCEG score recompute
  8. 2026-08-31 15:54 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-21827?
CVE-2026-21827 is a low vulnerability published on August 31, 2026. HCL Connections is vulnerable to an information disclosure vulnerability which could allow a user to obtain sensitive information they are not entitled to, caused by improper handling of request data they are not entitled to, caused by improper handling of request data.
When was CVE-2026-21827 disclosed?
CVE-2026-21827 was first published in the National Vulnerability Database on August 31, 2026, with the most recent update on September 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-21827 actively exploited?
CVE-2026-21827 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 95.3% of all scored CVEs.
What is the CVSS score of CVE-2026-21827?
CVE-2026-21827 has a CVSS v3 base score of 3.1 (NVD).
How do I remediate CVE-2026-21827?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-21827, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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